Electric impact  anikinterrtipteil



Dec. 28, 1943. A R. H. SMITH A 2,337,843

' ELECTRIC IMPACT AND INTERRUPTER SWITCH APPARATUS- Filed March so, 1940 2 sheets-sheet 1 feo.' ,155719, ',124 154 .0. l o Tlo o K \Z6` /f\ l l Dc.2s, 1943. l f R', HSM@ 2,337,843

ELECTRIC IMPACT AND INTERRPTER SWITCH APPARATUS Filed March 30, 1940 2 Sheets-Sheet 2 Patented Dec. Z8, 1943 UNITED 'IST-Ares ofFFllcE f ELcTnio ANDJNTERRPTER SW1-TCH APPmm'rUsr l l RoyH.-,Sn1lth;y0anton, Ohio, assigner oef-leone fourthto HurxthaLF. Frease, Canton,V Ohio i Appliatioifmrhso, 1940, serial N; 327;;062 m l1i claims; (c1. rift-12tl- My invention relate'sgenerally. to electricim-'-A pact apparatus whichmay include a' solenoid"- coil, a hammer such Yas aplunger'arran'gedfor oscillation as by straight"'li'ne"recipro'cation" by alternate kenergizing and' deeenerg'izing' ofthe solenoid coil, and a switch' for' controllingjthe energizing and deeenergizingof the solenoidv coil byV asuitable 'source of 'electric power.

Such electric impact "apparatus'ma'ylieni" cluded for example in'a to-yma'chinegun Where" it is only de'sired'to 'sinculateV thesound of a'm'ar chine'gun, vor in a toy' or otherv machinegun Whereinit is desired'to actually're capsiorbuls lets, or in an'electric reciprocating plunger" tool such as an electric hammer, a rock drill; andth-e like.

Inthe` usual electric reciprocating plungerjapr paratus, the frequencyof reciprocationof theW plunger' is constant` whereas"` in a usual air nameA mer or rockl drill, the reciprocations 0r strokes of' the plunger or piston have4 ai variable `fr`e-' quency.

The frequency of v reciprocations or' strokes` of L the plunger' of a'Y usua'helectric' reciprocating plunger apparatus'is controlledby ra, vibrator or interrupter' not' onlyl having `'aj constantfre quencybut alsol a" frequency' Which"'is" greaterv than'thatA of the v'shots' of 'a' usual machinegunf"l and` grater'tha'n thev 'frequency'. desired' lin many f plunger of a reciprocating plunger hammerjdrill,

vand thelike.`

More particularly my invention relates'to'electric impactv and interr'upter switch apparatus;

Prior to the present improvements the usual elec'-- tric interrupter has operated at a constant free" quency of circuit make-and-breaks, andk therev4 has not been available a manually/controlled variable frequency electric interrupterswitch vforv ".40

use for example for vtlleremote control 4of'electric reciprocating plunger apparatus such as a heavy machine gun, a heavy electric hammer, rock drill, or Crusher, andthe like. Y

The objects' of the presentA invention include' in general the provision`V of an improved electric impactV and 'interrupter `rswitch apparatus' which may vbe -embodied in an electric reciprocating plunger apparatushaving a frequency rof plunger reciprocations or strokes substantially the same as the frequency of re ofa usual'machine' gun, orthe' frequency of plunger" or piston reciproca-- tions or strokes of 'a usual air' hammer,- rock'` drill, or the like'.

Further objects'v of "the present inventionA inplunger.`

pact and:` interrupterswitchapparatus in'y which the frequency of'successivedmpacts orl strokes may befvaried:I n

Further objects' of vthe" presentik invention in` clude the` provision of animproved electric im# paci? and" the *interrupter switch' ap'paratus'in'- clud'ing' improved triggerT means for controlling' and varying' the escillati'on's'or straight*linere-- ciprocations or strokesof a hammersuch as 1a Further objectsfofflthepresent-invention"include the provision 'of improved manually conf trlledl electric impactand interriipterl vrswitch apparatus which may beada'pte'd' while operating to provide controlled andfvarialdle frequencies of electric*circuit"makeand-breaks e The foregoing andl othery objects; arev attained by the electric'l'impact'- andlfinterrupter switch apparatus, parts",v combinations; and-sub'-com`bi inations; which comprise*tHeY-present#invention;

ing generalV statern'entf, and*preferred''VembodiLA 'Y mentsA of Which-"together with their modelof `us`e are' set-forth byvvay of'lexam'pl in thefellow- L` infg-fdescription; anld'igvliich`V rare-particularlyj` and-` distinctly; pointedoutand setxforthl the apar Derllcd claims forming'A part'hereof.

mansiontne inianielctric' Y 1 1 iiniaccordancewitf 'heifree Olu'encyof.`4`v 'impabtsfagainstlriefra switch means includingwtwo" adjacent` contacts,

ed'fmeas operativelrmountingeone.ofthe @onge-fL tacts for vibration from and to connection with the other contact by vibration of the frame.

By way of example, embodiments of the improved electric impact and interrupter switch apparatus are illustrated in the accompanying drawings forming part hereof, in which Figure 1 is a perspective view of a first embodiment of the invention in the form of a toy machine gun having a self-contained flash light battery source of electric power, and being adapted for use to simulate only the sound of a machine gun;

Fig. 2, an enlarged side elevation View of the toy machine gun of Fig. 1 with portions removed, broken away, and shown in section, and the switch contacts being shown disconnected;

Fig. 3, a fragmentary View similar to Fig. 2,'the switch contacts being shown connected;

Fig. 4, a perspective View of a second embodiment of the invention in the form of a toy machine gun adapted for operation by connection with a usual electric power line, and which is arranged not only for simulating the'sound of a machine gun, but also for :tiring percussion Caps;

Fig. 5, an enlarged side elevation View of the toy machine gun of Fig. 4 with portions removed, broken away, and shown in section, the switch contacts being shown disconnected;

Fig. 6, a side elevation view of a third embodiment of the invention in the form of an electric hammer, with portions removed, broken away, and shown in section, and looking in the direction of the arrows 6 6, Fig. 7;

Fig. 7, another side elevation view of the electric hammer of Fig. 6, with portions removed, bro-ken away, and shown in section, and looking in the direction of the arrows 'I-l, Fig. 6; 4

Fig. 8, a fragmentary side elevation of a fourth embodiment of the invention in the form of another electric hammer, with portions removed, broken away, and shown in section; and

Fig. 9, a side elevation view of a fth embodiment of the invention in the form of a controlled and variable frequency electric impact interrupter switch for use for example for the remote control and the variable frequency energizing and deenergizing of an electro-magnetic solenoid coil which may be Aa part of an electric machine gun, a heavy electric hammer, and the like.

Similar numerals refer to similar parts throughout the several views.

In Figs. 1 to 3 Vinclusive is illustrated a rst embodiment of the invention in the form of a toy machine gun indicated generally by I, and which may be more broadly termed an electric impact and interrupter switch apparatus.

The toy machine gun electric impact and interrupter switch apparatus Ii) includes a frame .indicated generally by II which as shown includes a stock l2 made of Wood and an anvil member I3 made of metal secured to the stock I2.

The stock I2 includes a forward downwardly depending handle I4 having a compartment I5 formed therein, the upper end of which is closed by the anvil member I3 in the form of a metal plate or strip. At the forward end of the stock I2 beyond the handle I@ there is secured artube or rod I6 simulating the barrel of a machine gun, and on top of the plate anvil member `I3 there is secured a circular disk I'I with radially arranged mock cartridges 4I8 secured on its upper side, simulating the magazine of a machine gun.

In the compartment I of the-handle I4, a metal guide tube I9 is located with its longi- His also located a felt silencer plug 23 between -the upper end of the rebound spring 22 and the lower end of the plunger 2i).

An electro-magnetic solenoid coil 24 is located in the compartment I5 and engirdles the upper end of the guide tube IS with the reciprocating plunger 20 slidable therein.

The wood stock I2 of the frame II also has formed therein intermediate its ends a compartment 25. Improved preferably trigger controlled switch arm and contact means indicated generally by 26 are located in the compartment 25 and include an insulating block B at the upper end of the compartment 25.

From the insulating block B two side by side binding posts 27 and 28 depend downwardly into the compartment 25. A rst preferably spring switch arm 29 of conducting material is secured at its upper end to the block B for pivoting or swinging about one axis as shown formed by a bend in the upper end of the arm 29, the bent extremity of the upper end of the arm being secured to the binding posts 2'1. A second preferably spring switch arm 30 of conducting ma- Y terial is located in the compartment 25 at the forward side of the rst arm 29 and the second arm Si) is secured at its upper end to the block B for swinging or pivoting about a second axis as shown formed by-a bend in the upper end of the arm S, the bent extremity of the upper end of the arm Sil being secured to the binding post 28, and the second axis of pivoting being thus spaced at one side of the iirst axis of pivoting.

Arst contact 3i is located on the lower end portion of the first arm 29 on its side opposite the second arm 30, and a second Contact 32 is located on the lower end portion of the second arm 3E) on the side thereof opposite the first arm 29, and the iirst contact 3l and the second contact 32 are thus located adjacent and opposite each other.

The forward side of the switch arm and con tact compartment 23 has a trigger arm opening 33 formed therein in which is located a trigger arm 3d, the upper end of which is pivotally mounted on the stock I2 as by a pivot pin 35. From the rear side of the trigger arm 31% a cam finger It extends towards the second switch arm 353, and spring means normally maintain the trigger arm 3:1 and its cam nger 35 away from the second arm 3Q, which spring means as shown include a at spring 3lsecured at its upper end to the insulating block 2t and depending downv wardly therefrom between the trigger arm 34 and its cam nger 35 and the second arm 38.

As shown a push hger 38 is secured to and insulated from the second arm 3Q on its side opposite the fiat spring 3'! and the cam linger 35 oi the trigger arm Sli.

Both the push iinger 3B and the cam finger 35 are oiset from the second Contact 32 in the longitudinal direction of the second arm 3B.

lIn the stock I2 at the rear of the switch compartment 23 there is formed a battery compartment 39 having located at its forward end spaced vduitAIiconnects. the'binding post 2' with series connected'sbatteries, the-l0werrow-1of bat-fgl teries: ybeingV ser-ies connected. between .fthe ,for i Ward. springcontact strip 51H1- and., Onesidegof .--the .g

spring eontactistrps-a and# I fandfrat: its. Jeanie:

dry `batteries are :located i) rear spring" Ycontactv stripU42,-. and .the-.upper row of batteries beingafseries connectedr between'ithe.

other side ofthe -rearrcontact Strip 42-fandizthe forwardgspringcontact strip-z 41|-, lwhereby,the four batteriesare. series connected,between ,the spring n con-tactrstrips .40.and `II Iandponstitute a, selfyfy contained source'of.'electricpower for the toy..y

machine 1 gun. electric impact @andM interruptor...

switch apparatus IIL; i Y

The... battery,4 compartment- `32% Vcommunicates- V with...th'e;.coil compartment i5 by a .conduit 44- A conductor 41 extending through the conduit lldconnectsthe spring .contact stripv II with one terminal ofthe solenoid coilr 2li,Y and aconductor 48-extending through the vconduit 44 and thel branch .conduit li5.connects,the -other terminal oijth'e solenoid coil 2.4.-with theybinding postA 28,- and a conductor 49 extending through the conthe spring contact strip `4|). n y r At' the` lower.: end of ,the rst switch arm 29 th'er'eeis preferably secured .aninertia mass 50 which `may -be a rnetaldislr.k

In the operation ofthe toy machine gun electricirnpact andv interrupterswitch apparatus I0, when the Ytrigger arm 434 ris lpulled vbackwards it bows the :fiat spring'l .as showninv Fig. .3 to- Wards and l against push finger y38 on the second arm and movesthesecond arm 30and second contact 32 vtowardsthe rst arm 29.. The inertia mass `roripendulum disk. 50ltogether with the preferred springmaterial'ofthe.rst arm 29 constitutes rneansurgingI the .rst arm 29 to the. equilibrium yposition with respect tothe frame II shown inFigs. `2 and 3.

When the second Contact first Contact .3|.asshown inFig; 3, the series circuit of the. contactsBZ and 3|, thebatteries 43,y thelsolenoid` coil. 25,". and. the connecting conductors isclosed, and the soleno-idZII .is energized causing-an up-stroke of the hammer plunger 20 :izl connects with. the A- andan audibleiinpact of its upper end against y thelanvil'member ISoftherame |I.

The impact of the hammer plunger 20`against the vanvil ,member I3 of' the frame II. jars the first arm .2&3Y away from4 the v second yarm 30 and disconnects the contacts3| andv 32 and causes thecharnmer plunger `20 to'drop away from the anvilmember. Y Y

The first arm 29 4then swings back towardsits equilibriumposition completing one vibration from andgtowards its-.equilibrium position and again connects thefrst contact 3| with the secondgcontact 32 -causing another impact -of the hammer-plunger 20 against the frame anvil member I3and,anothenvibrationvofthearm 29 and itsfcontacth Successive-.impacts of the hammer plunger 20 againstvthe -frame-anvil member I3jand Vibrations of ythe ,arm 29- and contact 3| aresimilarly ,producedy as Vlong @vasthe trigger arm y g embodiment .offthe inventionfin the form-,of.

i rupter` Yswitchy .apparatus 1. I I 0 includes. a:

away frornritszequilibrium A:nostionishowrleirl 'fia 1 rto. apposition;;,permittnssthe vilt.ratingiy -rstfff contacti -3 I, f on@ the; vibrating.: armf 29,Tf to@ effec Successive connections and disconnectons: offfthw,

The frequency .ofy the connections and disc-:ont`v nectionsof thecontacts 3| and'l andthusfofn. the impacts-to-which the frame I I isr f subjected by j thef reciprocating-1` hammer. plunger 2 ligand `v` thussof the .vibrating` arm,.29-is determined -byf'y the vrextentof .pull lon the trigger arm 134;.which4 may be varied for lproducing a variable frequency; l of reciprocations of the hammer plunger.20.=and.f. ofk the impactsthereo againstthe framef,anvil l member. I3 andoi" the-vibrationso,the..arm- .r29f,

and ,Contact 3|..

Infthe ytoy machine. gun. electric impact. vand ,irre terrupter-switchv .apparatus .I gravity .is Y,utilized toY return the harnr'nerv plunger, 20 Aawayrirom:,the anvil member I3. Likewise gravity A;operating.;,4

' uponl the. inertia..mass .or pendulum diskf 50 utiizedein part ,to. urge. the .vibratinggarml y towards its equilibrium position.

In Fgs.4 and 5 vthere is `illustrated-a secon toy machinegun electric impact and-interrupt switch apparatus indicated. Agenerally by.: IIOQjan which *.is adapted for being energizedby conne tion jwith a usual' householdelectric.power ;lin e-..

thatv l is av `l1()-V VoltA .60 cycle alternating. current.:

line.

The toyfmachine gunelectric-impact and inte A III ywhich is arrangedier-horizontal pivotingcon..

is arrangedior. Verticallygpvotingon theuppei end of abaseLI52..

A gun rbarrel simulating tube I I5 is `located-,ain.-

the forward-endof the frame` II and aguidev.-A

gun barrell simulating-tube I i5, andaa recipro cating plunger hammered 20A-operates in ,the guide- -7 tube'g I I 9,lv and .a solenoid coil. I dengirdles ,the

' guidesite.Ilay I the `frame -I I I and-the front endof the -gu-idetube.v I I9 is 'supported ona #front :guide l tube g'niounting bracket I 54- on'the framed II.

The L rear endportion'ofcthe plunger: ham/mer |20 r extends through a compressionscoilf;springer.

|55; and the v'-rear end f offfthe ecompression A coilr` f spring |55 is secured tothe -plunger-hammerflm a and the forward vvend-offthe compression foo-il"A spring |55` abuts the -rearmguide'tube mounting@- bracket |53.

When etherk solenoid -coil |24 f is Y energized. the plunger hammerV |20-is drawnv Vforwa1"d,fronf1 its i positionV sliowninl'ig.-, 5, loading `the spring; |55; and when the solenoid coil I 24 isy deenergized'fthe f.; spring |55 thrustswthe -p1ungerhammer--|20to-p impact. against the metalanViI-.member lII Alcoil tape |56 of percussion vcapsgisopera-f.

tively mounted in the frame I Il I- and isadapted for being fed downwardly betweenthe: anvil-inem.V l. ber |l3. and the rear end 0f theplungerha-mmer |20 as by push arm means indicated generally by- |51, wherebythefcaps in; the tape |55 'ma-yy' y be red as` they pass floetweenA .therear-v endL f' theefpllllgel" hammer f |20 was itgsuccess-ivelyvgim 2:15am against thel anvil memberi 1.3 .1f

The toy machine gun electric impact and interrupter switch apparatus furthermore includes improved trigger controlled switch -arm and contact means |26 and conductors connecting the same with the solenoid coil |24 and adapted for connection with a household power supply line, and which are substantially the same as the similar trigger controlled switch arm and contact means 26 of the toy machine gun electric impact and interruptor switch apparatus ||l and the conductors connecting the same with the solenoid coil 24 and its flash light battery source of electric power.

Likewise the operation of the toy machine gun electric impact and interrupter switch apparatus ||6 is substantially the same as the operation of the toy machine gun electric impact and interrupter switch apparatus I6, with the additional ability of the apparatus ||l to re the caps in the tape |56.

It is to be noted however that the apparatus ||6 only operates on alternating current, the deenergizing of the solenoid coil |24 being rst effected after energizing when the alternating current passes through zero and when the loaded spring |55 impacts the plunger hammer |20 against the anvil member i3. v

A third embodiment of the invention is illustrated in Figs. 6 and '1 in the form of an electric hammer indicated generally by 2| which f also may be more broadh7 termed an electric impact and interrupter switch apparatus. The electric hammer 2li] includes a frame indicated generally byV 2|| including a cylindric housing 2|2 in which is located a metal guide tube 2|9, and a steel plunger hammer 226 is operable in the guide tube 2|9 for reciprocation between ra rebound anvil member 2|3-I at one end of the tube 2|6 and a tool shank guide sleeve anvil member 2|3-2 at the other end of the tube 2 I9.

The frame 2|| also includes a handle 258 on its end where the anvil member 2|3-| is located, and at the other end the tool shank guide sleeve anvil member 2|3-2 is adapted for receiving the shank of a drill and the like which extends beyond the inner end of the sleeve anvil member 2|3-2 for being struck by the plunger hammer 226, and the inner end of the sleeve anvil Y member 2|3-2 constitutes a limiting stop for the plunger hammer 226 in its strokes towards the sleeve anvil member 2|3-2, whether or not a tool is inserted in the sleeve anvil member 2|3-2.

Spaced solenoid coils 22d-l and 224-2 engirdle opposite end portions of the guide tube 2|9 and serve by alternate energization and deenergization to reciprocate the plunger hammer 226 in the tube 2|9 to alternately impact directly the anvil member 2|3-| and directly and indirectly the anvil member 2 |3-2.

'A control handle 259 is pivotally mounted on one side of the cylindric housing 2| 2 as by a pivot bolt 266 and the control handle 259 may as shown include a body 26| of insulating material with a removable outer cover plate 262.

Within the body 26| of the control handle 256v there is formed a compartment 225 in which are located trigger controlled switch arm and contact means indicated generally by 226.

The switch arm and contact means 226 include Within the compartment 225 a iirst preferably spring switch arm 229 of conducting material pivotally mounted on the handle body 26| at one end and having an inertia mass 250 at the other end and also having intermediate its ends a rstor innercontact 23| extending from each 'l side. On one side ofthe contact 23| Aand arm 229 an outer contact 232-| is mounted in the l compartment 225 opposite the inner contact 23|,

and on Vthe other rside of the contact 23| and arm 229 a second switch arm 230 is pivotally mounted at'one end of the handle body 26| and has mounted on Yits other end an outer contact 232-2, opposite the innercontact 23|. 1

The switch arm 236 is urged away from the arm l22S! asby a tension spring 263 connecting the arm 230 with the handle body 26|. A trigger arm 234 is pivotally mounted in a slot in the handle body 26| and includes a cam nose 236 abutting against the outer side of the switch arm 236.

On the housing 2|2 about the pivot bolt 260 and at the inside of the control handle 256, there is located a boss 264 of insulating material having mounted in its outer face three spaced conductor rings 265, 266, and 261, each having a dilerent diameter and which are concentric with each other and with the pivot bolt 266, and the handle body 26| has mounted therein contact pins 266, 266, and 216 respectively having their one end with a usual power supply line, and the conductor 215 is connected at its other end with the conductor ring 266. l The conductor 216 at its 'other' end is connected with one terminal of each of the solenoid coils 22d-l and 224-2. The other terminal of the solenoid coil 22d-I is connected with the conductor ring 261, and the other terminal of the solenoid coil 224-2 is connected with the conductor ring 265.

In the operation of the electric impactvand interrupter switch apparatus 2 6, the trigger arm 234 is pulled against the vsWtich arm 230 to effect an initial connection of the contact 232-2 with the inner contact 23| on the vswinging or vibrating arm 226 causing an energization of he solenoid coil 224-2 and impact of the plunger arm` 226 directly or indirectly against the sleeve anvil member 2|3-2, jarring the arm 229 away from the arm 230 and connecting the inner contact 23| with the other outer contact 232-l, and thereby energizing the other solenoid coil 22d-ll and causing a reverse stroke of the plunger hammer 226 to impact against the anvil member 2|3-| and jar the arm 229 and contact 23| away from the contact 232-l. The arm 226 thus vibrates to connect and disconnect the contact 23| successively with the contacts 232-2 and E32-l to alternately energize the solenoid v frames, and these vibrating arms are thus peni 'axes be above 'their inertia masses.

acca-8.43

c-dulum `arms which 4require that their pivoting Fig-18 a fourth .embodiment ,of the inven- -Jtionis indicatedgenerally by '3I0 rand is an elecltric .hammer 1or more' broadly .an Ielectric impact andinterrupter switch apparatus, which istgen- Yerally lsimilar with-respect ito its plunger ,and :solenoid coils @with the app-aratus 210, and `which 4includes alhandle 35,8 mounting improved 4 trigger controlled switch arm and vcontact means indicated generally by 326 which are generally' similarf'tothe trigger controlled switch ,armiand lconc tact means"226, but .which also-include a tension spring 3:111vconnecting the outer end of vthevi- 'bratng v Switch `arm "329 ywith the 4:hand-le yi553,

Vwhereby the yelectric hammer apparatus :Sie 4is operati-ve :regardless-of the position of thevibrat-` Sing arm v.iZtL n '-lIn`-Fig..9 is illustrated afifth embodiment of the invention in .the form of .a remote 4control f variable frequency impact. and Linterrupter switch aparatus indicated generally by M0 and .which VZVincludes iin a rframe All operating parts substantially :the same asthe operating `parts'iofithev -toy kmachine gun lill without the cap vtape eed meansfandwith the ad-dition of a secondswitch arm .and contact `means 426-#2 operative fby .vi- 'Pbrationo'f the frame i4 lilV to successively energize v -andde-energize a second electric circuit Aincluding conductors F418 and ll'lil, as for `examplea `circuit which may energize'the solenoid coil of va remote heavy electric hammer, electric ma- !chine gun and vthe like.

The embodiments of the present "invention lillustrated .anddescribed herein are by way of example, and the scope of the .present invention for controlling the `operation of the oscillating limpact means, the switch means including'` a "-rst-springarm-and a second spring arm spaced at -one v/side of -the first spring arm, means sideof the rst` spring arm, means mounting sim- 'ilar ends Yof the -spring arms on the `frame, each spring arm having anequilibrium position with respect `tothe frame, a rst contact on the first spring arm A.anda second contact on the second lspring arm .opposite the first Contact, the first Vspring arm vibrating from and to its equilibrium position withl respect to the frame by vibration `of `thezframe, and a member operative for swinging the second arm from its equilibrium ipositionitowards and away from the equilibrium positionxof the .rst spring arm `for connecting and disconnectingthe contacts and for Varying the frequency ,ofthe oscillating impact means andthe vibrating Lfirst'spring armfand rst con` tact, andan inertia mass on the first `spring I3.- In variable frequency electric impact and interrupter switch apparatus, a frame, electri- `vcally operated oscillating impact means for vibrating :the `frame, switch means on the frame `for controlling `the operation of the oscillating impact means, `the switch means including 1a v -first arm and a second arm spaced at `one side i of `the rst arm, means mounting the rstarm for swinging about an axis on the frame, and means mounting the second arm for swinging about an axis ,on the frame, a first contact on 'the first armfand aisecond contact on fthe sec- 30' ond armv oppositentheI first contact, the rst arm' vibrating about its yaxis from and to an equilibrium positionwith respect to the frame `by vibration -of the rframe. and a member oper- 4ative `for swinging the second arm towardsand vaway from the equilibrium position of the rst arm for connecting andl disconnecting theicontacts and for varyingjithe frequency ofthe oscillating impact means and the vibratingrst arm zand first contact, and means urging the firstv yarm .towards its equilibrium position.

4. Y:In .variable frequency electric impact and interrupter switch apparatus, a frame, electrically operated oscillating impact meansfonvi- ,brating Vthe frame, .switch means on the frame for controllingthe operation of the oscillating 'impact means, `the switch means including ya rst spring arm and a second springvarm spaced I brating the'frame, switchfmeans on the irame.,

' at one'side of the'first spring'arm, means mounting similar ends of the spring arms on the Trame, Aeach spring arm having an equilibrium position .with respect to the frame, a` first con- "tactvon 1therst-spring arm and a second con- 'mounting Asimilar endsV of the spring arms on v the `frame, each spring arm having anequilibriumposition `withrespect to the frame, a

'-rst contact on the first spring arm anda second i contact on the second springy arm-opposite the vfirstco1 'itaci the flrsts'pring arm Vibrating from and toiitsiequilibrium positionwith respect *to the -frame 'byiyibration of the frame, and a member operative for swinging the second arm from its equilibrium position towards and away vto from the equilibrium position of therst spring i arm for connecting and disconnecting the contacts and for varying the frequency of the oscillating impact means and the Vibrating first spring arm and first contact. y

2. In variable frequency electric impact and interrupter switch apparatus, a frame, electrically operated oscillating impact means forvibrating the frame, switch means` on the frame for controlling the operation of the oscillating impact means, the switch means including a first spring arm and a second spring arm spaced at onek tact on the secondfspring arm opposite the/first contact,the'f1rst spring arm vibrating from and to .its .equilibrium position with respect tothe `frame by vibration of the frame, and a member operative 'foriswinging the second armv fromr its x equilibrium position towards andv away from the `equilibrium position of the first spring arm for connecting and disconnecting the contacts and forA varying the `frequency `of vthe oscillating -impact means and the vib-rating first spring arm and irst contact, and means urging the rst spring arm towards its equilibrium position.:

5. In variable frequency electric impact and interrupter switch apparatus, a frame, electri-v cally operated oscillating impact means for vibrating the frame, switch means on the frame for controlling the operation of the oscillatingr impact means, the switch means including a iirst arm and a second arm spaced at one side of the rst arm, means mounting the rst arm 1 for swinging about an axis on the frame, and means mounting the second arm for swinging about an laxis on the frame, a rst contact on ond arm opposite the rst contact, the rst arm vibrating about its pivot axis fromand to an equilibrium position with respect tothe frame by vibration of the frame, and a member operative for swinging the second arm towards and away from the equilibrium position of the iirst armfor connecting and disconnecting the'contactjs` and for varying the frequency of the oscillating impact means and the Vibrating first arm Y and rst contact, and spring means urging the iirst arm towards its equilibrium position.

6. In variable frequency electric impact and interrupter switch apparatus, a frame, electrically operated oscillating impact means for vibrating the frame, switch means on the frame for Y controlling the operation of the oscillating impact means, the switch means including a first `arm and a second arm spaced at one Side of the rst arm, means mounting the first arm for swinging about an axis on the frame, and means mounting the second arm for swinging about an axis on the frame, a iirst Contact on the rst arm and a second contact on the second arm opposite the rst contact, the iirst arm vibrating about its axis from and to an equilibrium position with respect to the frame by vibration of the frame, and a member operative for swinging the second arm towards and away from the equilibrium position of the rst arm for connecting and disconnecting the contacts and for varying the frequency of the oscillating impact means and the vvibrating rst arm and rst contact, and an inertia mass on the first arm, and spring means urging the first arm towards its equilibrium position.

'7. In co-ntrolled frequency electric impact and interrupter switch apparatus, a frame, controlled frequency means including an oscillating member for subjecting the frame to vibration by successive' impacts, a plurality of switch means on the frame each adapted for interrupting the current inan electric circuit in accordance with the frequency of the impacts against the frame, each switch means including two adjacent contacts,

and means operatively mounting one of the contacts for Vibration from and to connection with 'the other contact by vibration of the frame.

f the rst arm land a second contact on the secswitch apparatus, a `frame, two spaced Vspring arms, means mounting each arm for swinging about an axis on the frame towards and away from the other arm, a contact on each arm op- .posite the contact on the other arm, and lever actuated control means including a member adjacent one of the arms and operable to move the adjacent arm with'respect to the other arm, the arm moving member being offset from the contact of the adjacent arm in the longitudinal direction of the adjacent arm.

10. In controlled frequency electric interrupter switch apparatus, a frame, two spaced arms, means mounting each arm for free swinging about an axis on the frame towards and away from the other arm, a contact on each arm opposite the contact on the other arm, and control means including a member adjacent one of the arms and operable to move the adjacent arm with respect to the other arm, and means urging the arm moving member away from the adjacent arm.

11. In controlled frequency electric interrupter switch apparatus, a frame, two spaced arms, means mounting each arm for free swinging about an axis on the frame towards and away from the other arm, a contact on each arm opposite the contact on the other arm, and control means including a member adjacent one of the arms and operable to move the adjacent arm with respect to the other arm, and means for vibrating the frame.

12. In controlled frequency electric interrupter switch apparatus, a frame, two spaced arms, means mounting each arm for free swinging about an axis on the frame towards and away from the other arm, a contact on each arm opposite the contact on the other arm, and means for vibrating the frame.

13. In controlled frequency electric interrupter switch apparatus, a frame, two spaced arms, means mounting each arm for free swinging about an axis on the frame towards and away from the other arm, and a contact on each arm opposite the contact on the other arm, and lever means including a member adjacent one of the arms swingable to move the adjacent arm with respect to the other arm.

14. In electric interrupter apparatus, a frame, two spaced arms, means mounting each arm for swinging about an axis on the frame towards and away from the other arm, a contact on each arm opposite the contact on the other arm, and means for vibra-ting the frame including solenoid series connected with the arm contacts and with a source of alternating current, a plunger operatively associated with the solenoid for movement into the solenoid when the solenoid is energized, an anvil opposite one end of the plunger, and means urging the plunger towards the anvil.

ROY H. SMITH. 

